mntdata.h revision 54c529d43d4363891fd7381edde56d2cafbff593
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_MNTFS_MNTDATA_H
#define _SYS_MNTFS_MNTDATA_H
#include <sys/vnode.h>
#include <sys/poll.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct mntsnap {
char *mnts_text; /* base address of text in user addr space */
size_t mnts_textsize; /* size of mapped text */
char *mnts_metadata; /* base address of metadata in user space */
size_t mnts_metasize; /* size of mapped metadata */
uint_t mnts_count; /* number of mounts in snapshot */
timespec_t mnts_time; /* time when snapshot was taken */
} mntsnap_t;
typedef struct mntnode {
uint_t mnt_flags; /* flags */
vnode_t *mnt_mountvp; /* vnode mounted on */
vnode_t *mnt_vnode; /* vnode for this mntnode */
mntsnap_t mnt_read; /* Data for read() */
mntsnap_t mnt_ioctl; /* Data for ioctl() */
uint_t mnt_offset; /* offset within ioctl() snapshot */
krwlock_t mnt_contents; /* protects mnt_read, mnt_ioctl, mnt_offset */
} mntnode_t;
struct zone;
typedef struct mntdata {
struct zone *mnt_zone; /* zone for mount point */
uint_t mnt_nopen; /* count of vnodes open */
size_t mnt_size; /* latest snapshot size for mount */
struct mntnode mnt_node; /* embedded mntnode */
} mntdata_t;
/*
* Conversion macros.
*/
#define VTOM(vp) ((struct mntnode *)(vp)->v_data)
#define MTOV(pnp) ((pnp)->mnt_vnode)
#define MTOD(pnp) ((struct mntdata *)MTOV(pnp)->v_vfsp->vfs_data)
#if defined(_KERNEL)
/*
* Values for mnt_flags.
*/
#define MNT_SHOWHIDDEN 0x1 /* Hack to show all mounts, even MS_NOMNTTAB */
extern struct vnodeops *mntvnodeops;
extern void mntfs_getmntopts(struct vfs *, char **, size_t *);
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS_MNTFS_MNTDATA_H */